VLAN simple Solution

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vlan=Virtual local area network=

Category: Port-based virtual local area network

Virtual local area network based on IP address

A virtual local area network based on MAC address

Purpose: to logically partition (non-physical) a local area network (LAN) device into a network segment (or a smaller LAN)

Why to Row VLANs:

1: based on organizational structure considerations, staff in different physical locations of the same department. If the finance department of a large company is located in a subsidiary, they

Requires data security and sharing. It can be located in the same virtual local area network (switch), centralized management control.

2: security-based considerations. Because each virtual network can not communicate directly, must be forwarded through the router, such as group companies, have a wealth

Department, marketing department. only interface data can be provided to each other, other data is confidential, and the division is isolated by dividing the VLAN.

     3:

storm, causing the network to jam. By dividing multiple VLANs to reduce the transmission of broadcast packets in the network (broadcast packets are not cross-VLAN) , the broadcast packets are limited to the range of each virtual network (the broadcast domain is reduced), thus improving the transmission efficiency of the network and improving the network performance. Yes.

Advantages of VLANs:

1: control broadcast Storm

     2: improve overall network security

     3: Simple and intuitive network management

Configuration of the VLAN:

switch1#switch1#vlan database                            #进入vlan数据库模式Switch1 (VLAN) # vlan 2                               #创建vlan  2switch1 (VLAN) #vlan  2 name caiwubu      #给vlan  2 named CaiwubuSwitch1 (VLAN) #vlan  10                             #创建vlan  10switch1 (VLAN) #exit                                   # Exit and save-------------------------------------------------------------------------------------Switch1 (config) #interface  fastethernet0/1              #进入接口模式   f0/1switch1 (config-if) #switchport  mode access            #将接口模式配置为access (Access) Switch1 (config-if) #switchport  access  vlan2           #将这个接口加入到vlan  2 switch ( config-if) # no switchport access vlan 2      #将接口从vlan  2 Delete------------------------------------------------------------------------------------other commands in  : Switch ( Config) #no   vlan  10                                 #删除vlan10Switch #show vlan                                               #查看vlan信息Switch (config-if) #no  switchport                          #关闭二层模式Switch #show vlan brief                                      #查看vlan下接口所属状态Switch #show vlan-switch                                   #查看所有vlan信息Switch # show  vlan id 2                                     #查看指定vlan信息Switch ( Config) # interface range f0/1 – 10              #将一个接口范围f0/1 -10switch (config-if-range) # switchport access vlan  2    #将这10个接口加入vlan  2

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VLAN simple Solution